[slideshare] fix extraction

gallery_dl/extractor/slideshare.py

@@ -30,21 +30,20 @@ class SlidesharePresentationExtractor(GalleryExtractor):
             "count": 19,
             "content": "2b6a191eab60b3978fdacfecf2da302dd45bc108",
             "keyword": {
-                "comments": "0",
                 "description": "Get Started with SlideShare - "
                                "A Beginngers Guide for Creators",
-                "likes": r"re:\d{3,}",
+                "likes": int,
                 "presentation": "get-started-with-slide-share",
-                "published": "dt:2015-05-20 00:00:00",
+                "date": "dt:2015-05-20 17:38:21",
                 "title": "Getting Started With SlideShare",
                 "user": "Slideshare",
-                "views": r"re:\d{7,}",
+                "views": int,
             },
         }),
         # long title and description
         (("https://www.slideshare.net/pragmaticsolutions/warum-sie-nicht-ihren"
           "-mitarbeitenden-ndern-sollten-sondern-ihr-managementsystem"), {
-            "url": "cf70ca99f57f61affab47ebf8583eb564b21e3a7",
+            "url": "d8952260f8bec337dd809a958ec8091350393f6b",
             "keyword": {
                 "title": "Warum Sie nicht Ihren Mitarbeitenden ändern "
                          "sollten, sondern Ihr Managementsystem",
@@ -58,7 +57,7 @@ class SlidesharePresentationExtractor(GalleryExtractor):
         # mobile URL
         (("https://www.slideshare.net"
           "/mobile/uqudent/introduction-to-fixed-prosthodontics"), {
-            "url": "43eda2adf4dd221a251c8df794dfb82649e94647",
+            "url": "72c431cb1eccbb6794f608ecbbc01d52e8768159",
         }),
     )
 
@@ -69,43 +68,31 @@ class SlidesharePresentationExtractor(GalleryExtractor):
         GalleryExtractor.__init__(self, match, url)
 
     def metadata(self, page):
-        extr = text.extract_from(page)
-        descr = extr('<meta name="description" content="', '"')
-        comments = extr('content="UserComments:', '"')
-        likes = extr('content="UserLikes:', '"')
-        views = extr('content="UserPageVisits:', '"')
-        title = extr('<span class="j-title-breadcrumb">', '</span>')
-        published = extr('<div class="metadata-item">', '</div>')
-
-        if descr.endswith("…"):
-            alt_descr = extr('slideshow-description-text"', '</p>')
-            if alt_descr:
-                descr = text.remove_html(alt_descr.partition(">")[2]).strip()
+        data = util.json_loads(text.extr(
+            page, 'id="__NEXT_DATA__" type="application/json">', '</script>'))
+        self.slideshow = slideshow = data["props"]["pageProps"]["slideshow"]
 
         return {
-            "user": self.user,
+            "user"        : slideshow["username"],
             "presentation": self.presentation,
-            "title": text.unescape(title.strip()),
-            "description": text.unescape(descr),
-            "views": views,
-            "likes": likes,
-            "comments": comments,
-            "published": text.parse_datetime(
-                published.strip(), "%b. %d, %Y"),
+            "title"       : slideshow["title"].strip(),
+            "description" : slideshow["description"].strip(),
+            "views"       : slideshow["views"],
+            "likes"       : slideshow["likes"],
+            "date"        : text.parse_datetime(
+                slideshow["createdAt"], "%Y-%m-%d %H:%M:%S %Z"),
         }
 
-    @staticmethod
-    def images(page):
-        data = util.json_loads(text.extract(
-            page, "xtend(true, slideshare_object.slideshow_config, ", ");")[0])
+    def images(self, page):
+        parts = self.slideshow["slideImages"][0]["baseUrl"].split("/")
 
-        # useing 'stripped_title' here is technically wrong, but it works all
-        # the same, slideshare doesn't seem to care what characters go there
-        begin = "https://image.slidesharecdn.com/{}/95/{}-".format(
-            data["ppt_location"], data["stripped_title"])
-        end = "-1024.jpg?cb=" + str(data["timestamp"])
+        begin = "{}/95/{}-".format(
+            "/".join(parts[:4]),
+            self.slideshow["strippedTitle"],
+        )
+        end = "-1024.jpg?" + parts[-1].rpartition("?")[2]
 
         return [
             (begin + str(n) + end, None)
-            for n in range(1, data["slide_count"]+1)
+            for n in range(1, self.slideshow["totalSlides"]+1)
         ]